Effect of Consortium of Plant Growth Promoting and Compost Inhabiting Bacteria on Physicochemical Changes and Defense Response of Maize in Fungus Infested Soil

Akhtar, Naseem; Naveed, Muhammad; Iqbal, Muhammad; Khalid, Muhammad Shafique; Waraich, Ejaz Ahmad

doi:10.21162/pakjas/16.4700

Cited by 9 publications

(2 citation statements)

References 70 publications

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“…Cu: copper, Ni: nickel, Zn: zinc, Fe: iron, Cl: chlorine, Mn: manganese, and Co: cobalt. [41]. Enhanced seed germination might be due to attachment of PGPR to the seed surface and synthesis of growth phytohormones, which perhaps activate specifc enzymes involved in starch assimilation and promote seed germination [41].…”

Section: Discussionmentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Adverse Effects of Salinity and Drought Stresses by Regulating Nutritional Profile of Barley

Zaib,

Zubair,

Abbas

et al. 2023

Applied and Environmental Soil Science

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With the growing emphasis on sustainable agriculture, food security, and environmental protection, the use of beneficial soil microbes is imperative, as the use of chemicals such as fertilizers, pesticides, and herbicides has resulted in food contamination, disease, weed resistance, and negative environmental consequences, which ultimately impacted human health. Climate change is a major factor and is of great concern for crop production. Abiotic stresses, including salt and drought stress, restrain the crop yield. The aim of this particular study is to understand what role do plant growth-promoting rhizobacteria (PGPR) play in combating the salinity and drought stresses through modification of nutritional profile. In the current study, inoculated barley (Hordeum vulgare L.) plants were subjected to various stresses such as 200 mM and 1000 mM salinity stress as well as drought stress, and then their various parameters such as seed germination as well as shoot and root biomasses and photosynthetic activity were compared with non-treated stressed barley plants. Our data depicted an improvement or significant enhancement of these parameters in PGPR (Pseudomonas fluorescens SBW25 and Pseudomonas putida KT2440) applied barley plants. Furthermore, the particle-induced X-ray emission (PIXE) technique was used for the elemental analysis of PGPR-inoculated and non-inoculated plants under stress vs. no stress conditions. Our PIXE analysis of various macro- and micronutrients revealed an enhancement of Ca, Mg, K, P, S, Al, and Si uptake in PGPR-treated plants. PGPR applications depicted reduced Cl− contents in 200 mM salt-stressed barley roots (KT2440 = 7.7 mg/kg and SBW25 = 6.3 mg/kg) and stems (KT2440 = 406.4 mg/kg and SBW25 = 365.5 mg/kg) as compared to controls (roots = 8.9 and stems = 469.5), while they displayed a significant increase in the barley leaves (KT2440 = 405 mg/kg and SBW25 = 416.4 mg/kg) when compared to control (110.6 mg/kg) under the same stress condition. In 1000 mM salt stress, a significant reduction in the Cl− content was observed in PGPR-applied barley roots (KT2440 = 7.6 mg/kg), stems (KT2440 = 1205.8 mg/kg and SBW25 = 1008.3 mg/kg), and leaves (KT2440 = 967.8 mg/kg and SBW25 = 530.8 mg/kg) when compared to controls (roots = 15.2 mg/kg, stems = 1605.2 mg/kg, and leaves = 1165.2 mg/kg). On the other hand, a significant increase in the Cl− content was noticed in PGPR-applied barley roots (KT2440 = 29.5 mg/kg and SBW25 = 25.8 mg/kg), stems (KT2440 = 1023.8 mg/kg and SBW25 = 894.9 mg/kg), and leaves (KT2440 = 369.2 mg/kg and SBW25 = 409.8 mg/kg) when compared to controls (roots = 13.5 mg/kg, stems = 505.3 mg/kg, and leaves = 219.9 mg/kg) under drought stress condition. PGPR application was also found to be effective for enhancing the uptake of micronutrients (Mn, Fe, Co, Ni, Cu, and Zn) in barley plant parts under control and also under stressed conditions. Overall, our findings revealed an improvement in the uptake of macro- and micronutrients for the enhancement of salinity and drought stress tolerance. Conclusively, these PGPR species are an effective source of plant stress tolerance and elevated growth of barley and related plants under stress conditions.

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Section: Discussionmentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Adverse Effects of Salinity and Drought Stresses by Regulating Nutritional Profile of Barley

Zaib,

Zubair,

Abbas

et al. 2023

Applied and Environmental Soil Science

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“…Increased shoot length, root length, protein content, chlorophyll content, nutrient uptake, tolerance to abiotic stress, yield, shoot and root weights, delayed senescence, hydraulic activity, leaf area, and biocontrol were all observed because of PGPR interactions with the plants [147]. In biotic stress, such as physicochemical fluctuations, the consortium of suitable microbial isolates supports plant growth marvelously and secretes particular helpful substances in damaged plants [148]. Stress has a direct or indirect negative impact on the growth and development of plants.…”

Section: Beneficial Rhizobacteria Reduce Abiotic Stress In Medicinal ...mentioning

confidence: 99%

Medicinal plant‐associated rhizobacteria enhance the production of pharmaceutically important bioactive compounds under abiotic stress conditions

Vaghela

Gohel

2022

J Basic Microbiol

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Interest in cultivating valuable medicinal plants to collect bioactive components has risen extensively over the world to meet the demands of health care systems, pharmaceuticals, and food businesses. Farmers commonly use chemical fertilizers to attain maximal biomass and yield, which have negative effects on the growth, development, and bioactive constituents of such medicinally important plants. Because of its low cost, environmentally friendly behavior, and nondestructive impact on soil fertility, plant health, and human health, the use of beneficial rhizobial microbiota is an alternative strategy for increasing the production of useful medicinal plants under both standard and stressed conditions. Plant growth‐promoting rhizobacteria (PGPR) associated with medicinal plants belong to the genera Azotobacter, Acinetobacter, Bacillus, Brevibacterium, Burkholderia, Exiguobacterium, Pseudomonas, Pantoea, Mycobacterium, Methylobacterium, and Serratia. These microbes enhance plant growth parameters by producing secondary metabolites, including enzymes and antibiotics, which help in nutrient uptake, enhance soil fertility, improve plant growth, and protect against plant pathogens. The role of PGPR in the production of biomass and their effect on the quality of bioactive compounds (phytochemicals) is described in this review. Additionally, the mitigation of environmental stresses including drought stress, saline stress, alkaline stress, and flooding stress to herbal plants is illustrated.

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Plant Growth-Promoting Bacterial Consortia Render Biological Control of Plant Pathogens: A Review

Pellegrini

Djebaili

Pagnani

et al. 2023

Microorganisms for Sustainability

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Effect of Consortium of Plant Growth Promoting and Compost Inhabiting Bacteria on Physicochemical Changes and Defense Response of Maize in Fungus Infested Soil

Cited by 9 publications

References 70 publications

Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Adverse Effects of Salinity and Drought Stresses by Regulating Nutritional Profile of Barley

Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Adverse Effects of Salinity and Drought Stresses by Regulating Nutritional Profile of Barley

Medicinal plant‐associated rhizobacteria enhance the production of pharmaceutically important bioactive compounds under abiotic stress conditions

Plant Growth-Promoting Bacterial Consortia Render Biological Control of Plant Pathogens: A Review

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